The Sing-Off returned for its third season on Monday night with a group performance of Pink's 'Raise Your Glass' which introduced us to this season's brand new batch of a cappella groups vying for the $200,000 prize and a recording contract with Sony Music.

Nick Lachey opened the show by explaining that the groups had been divided into two brackets of eight. The first eight would perform tonight with only six progressing to the next round, meaning two were going home that night.

Unfortunately for the eight siblings in Fannin Family (below left) and slick all-male group Cat's Pajamas (below right), they were the first casualties of the new season.

Fannin Family - who come from a family of 11 siblings - had performed 'Who Says' by Selena Gomez. Ben had noted that being family could give them an unfair advantage because they blend effortlessly but also pointed out any advantage was offset by the fact their voices were similar and could bunch together. The star of their performance was 14-year-old Maria, who was praised by all three judges.

Watch Fannin Family's performance below:

Cat's Pajamas took to the stage for a rendition of 'Some Kind of Wonderful' by Grand Funk Railroad and while Ben was impressed with their musical impact and gelled voices, he asked them to think about how more powerful they would sound if they put something about themselves in the song. Shawn thought they were born entertainers but questioned how they would translate on the radio.

The other six a cappella groups who performed on Monday night all booked their place in the next round of the competition. Here's a look at their performances and what the judges said:

Yellow Jackets - 'Wavin' Flag' by K'naan The University of Rochester group were praised for their sense of brotherhood and unity, although Ben suggested the tempo fluctuated at times.

Afro-Blue - 'Put Your Records On' by Corinne Bailey Rae They were praised for making jazz accessible and delivering the message of the song. Shawn said: "Class, style, slick, smooth, effortless, fun. You made what is difficult for most singers look easy."

Delilah - 'Grenade' by Bruno Mars This all-girl group were praised for their passionate rendition of the song, with Shawn jokingly asking singer Amy what boyfriend she had channeled to make her performance so fiery.

Urban Method - 'Love The Way You Lie' by Eminem and Rihanna They introduced their style of "rapapella" with this well-received performance, with the judges saying they sounded almost like a backing track during the rapping parts of the song.

Kinfolk 9 - 'Secrets' by OneRepublic They booked their place in the next round with a performance which the judges said showcased their hunger and desire to succeed in the competition.

Vocal Point - 'Jump, Jive an' Wail' by Brian Setzer Orchestra Despite missing their baritone Ben, who was tending to his ill father, this group earned a standing ovation with the high note at the end and won over the judges with their infectious energy.